Back
 OJCE  Vol.6 No.3 , June 2016
Investigation of Effects of Capacity Spectrum Method on Performance Evaluation of Multi-Story Buildings According to the IRAQI Seismic Code Requirements
Abstract: The aim of this study is to assess the performance objectives defined in the Iraqi Seismic Code (ISC) in order to make a realistic evaluation related to Performance-Based Seismic Design (PBSD) of multi-story reinforced concrete buildings and also to compare and evaluate structural response demands obtained from nonlinear static analysis procedures according to two versions of the capacity spectrum method (CSM) which are recommended in ATC 40 and ATC 55. Two groups of three-dimensional RC buildings with different heights, designed according to Iraqi Building Code Requirements for Reinforced Concrete (IBC), are investigated. Pushover analyses are carried out to determine the nonlinear behavior of the buildings under three different seismic hazard levels, for two Iraqi seismic zones, of earthquake loads. In order to determine performance levels of the buildings, maximum inter-story drift demands and plasticizing sequence are determined and compared with the related limits using the CSM recommended in ATC 40 and ATC 55. From the results of this research, it can be concluded that RC buildings designed according to the Iraqi codes sufficiently provide the performance objectives stipulated in the ISC. Comparing structural response quantities obtained from the two versions of CSM, effects on performance evaluations of the buildings are investigated comparatively, as well.
Cite this paper: Amer, A. , Sobaih, M. and Adel, A. (2016) Investigation of Effects of Capacity Spectrum Method on Performance Evaluation of Multi-Story Buildings According to the IRAQI Seismic Code Requirements. Open Journal of Civil Engineering, 6, 420-441. doi: 10.4236/ojce.2016.63036.
References

[1]   Poland, C.D. and Hom, D.B. (1997) Opportunities and Pitfalls of Performance Based Seismic Engineering. Proceedings of the International Workshop on Seismic Design Methodologies for the Next Generation of Codes, Bled, Slovenia, 69-78.

[2]   Bento, R., Falcao, S. and Rodrigues, F. (2004) Nonlinear Static Procedures in Performance Based Seismic Design. Proceedings of the 13th World Conference on Earthquake Engineering, Canada Engineering, Vancouver, Canada.

[3]   Applied Technology Council ATC (1996) Seismic Evaluation and Retrofit of Concrete Buildings. ATC 40, Vol. 1, Washington DC.

[4]   FEMA 237 (1997) NEHRP Guidelines for the Seismic Rehabilitation of Buildings. Washington DC.

[5]   FEMA 356 (2000) Prestandard and Commentary for the Seismic Rehabilitation of Buildings. Washington DC.

[6]   Kalkan, E. and Kunnath, S.K. (2007) Assessment of Current Nonlinear Static Procedures for Seismic Evaluation of Buildings. Engineering Structures, 29, 305-316.

[7]   Chopra, A.K. (2007) Dynamic of Structures, Theory and Applications to Earthquake Engineering. 3rd Edition, Prentice Hall, Upper Saddle River.

[8]   Irtem, E., Turker, K. and Hasgul, U. (2007) Causes of Collapse and Damage to Low-Rise RC Buildings in Recent Turkish Earthquakes. Journal of Performance of Constructed Facilities, 21, 351-360.
http://dx.doi.org/10.1061/(ASCE)0887-3828(2007)21:5(351)

[9]   Irtem, E. and Hasgul, U. (2009) Investigation of Effects of Nonlinear Static Analysis Procedures to Performance Evaluation on Low-Rise RC Buildings. Journal of Performance of Constructed Facilities, 23, 456-466.
http://dx.doi.org/10.1061/(ASCE)CF.1943-5509.0000047

[10]   ATC 55 (2005) Applied Technology Council. Improvement of Nonlinear Static Seismic Analysis Procedures, FEMA440 Report. Redwood City, CA.

[11]   Comartin, C.D., et al. (2004) A Summary of FEMA 440: Improvement of Nonlinear Static Seismic Analysis Procedures. 13th World Conference on Earthquake Engineering, Vancouver, Canada.

[12]   Freeman (1998) Development and Use of Capacity Spectrum Method. Proceedings of the 6th U.S. National Conference on Earthquake Engineering, Seattle, Oakland, USA.

[13]   Freeman, S.A., Nicoletti, J.P. and Tyrell, J.V. (1975) Evaluation of Existing Buildings for Seismic Risk—A Case Study of Puget Sound Naval Shipyard, Bremerton, Washington. Proceedings of U.S. National Conference on Earthquake Engineering, Berkeley, 113-122.

[14]   Chopra, A.K. and Goel, R.K. (2000) Evaluation of NSP to Estimate Seismic Deformation: SDF Systems. Journal of Structural Engineering, 126, 482-490.
http://dx.doi.org/10.1061/(ASCE)0733-9445(2000)126:4(482)

[15]   Iraqi Building Code Requirements for Reinforced Concrete, IBC, Code 1/1987. Building Research Centre, Baghdad, Iraq.

[16]   Iraqi Seismic Code Requirements for Buildings, ISC, Code 2/1997. Building Research Centre, Baghdad, Iraq.

[17]   CSI. SAP2000 V-17 (2014) Integrated Finite Element Analysis and Design of Structures Basic Analysis Reference Manual. Computers and Structures, Inc.

 
 
Top